中考英語復(fù)習(xí)學(xué)案(8A Unit6Natural Disasters)
二.過去進(jìn)行時(shí)的句式(1)基本結(jié)構(gòu):was/were + v-ing(2)否定式: was/were not + v-ing (was not = wasn’t / were not = weren’t)(3)疑問句:將 was/were 調(diào)到主語前 三.過去進(jìn)行時(shí)的基本用法:1.表示在過去某個(gè)時(shí)間點(diǎn)正在發(fā)生的動(dòng)作.常與at ten last night, at this time yesterday, at that time/moment,when i came in等連用.2.表示在過去某段時(shí)間之內(nèi)持續(xù)不斷發(fā)生的動(dòng)作.常與last night, this morning, from…to(from7 to 10 this morning)連用.3.有時(shí)為了句子表達(dá) 的需要,我們可以用復(fù)合句來表達(dá)過去進(jìn)行時(shí).如 • 昨晚當(dāng)我到家的時(shí)候,媽媽和爸爸正在看電視. my parents were watching tv when i arrived home last night.• 剛才當(dāng)老師走進(jìn)教室的時(shí)候,學(xué)生們正在讀書. students were reading when the teacher came in just now.在這些句子中,when引導(dǎo)的句子表過去的某一個(gè)具體的時(shí)間,when從句用一般過去時(shí),而它的主句用過去進(jìn)行時(shí).• 但是若強(qiáng)調(diào)某個(gè)動(dòng)作正在進(jìn)行中時(shí),又發(fā)生了別的動(dòng)作,用when從句. when從句必用過去進(jìn)行時(shí),主句用一般過去時(shí).(表示在when從句正進(jìn)行期間又發(fā)生了主句的動(dòng)作)此時(shí), when=while,表時(shí)間段.如 • 當(dāng)學(xué)生們正在讀書時(shí),老師走進(jìn)了教室. • 昨晚當(dāng)爸爸和媽媽正在看電視時(shí),我到家了. • when/while we were having supper, the light went out. • when/while he was riding a bike, he fell off and hurt his leg. • 若主,從句兩個(gè)延續(xù)動(dòng)作同時(shí)進(jìn)行,用while,則主句與從句都用進(jìn)行時(shí), 此時(shí),while譯為“而” “一邊,一邊”,如:• he was reading the newspaper while i was studying.四.過去進(jìn)行時(shí)與一般過去時(shí)的區(qū)別 1.)過去進(jìn)行時(shí)著重描述當(dāng)時(shí)正在進(jìn)行的動(dòng)作,它的特點(diǎn)是:未完成,強(qiáng)調(diào)過程; 一般過去時(shí)表示一個(gè)業(yè)已完 成的動(dòng)作,表示動(dòng)作發(fā)生過,而且已經(jīng)結(jié)束了,強(qiáng)調(diào)結(jié)果。 2.)過去進(jìn)行時(shí)側(cè)重表示動(dòng)作的延續(xù); 一般過去時(shí)表示過去某時(shí)發(fā)生過某事,側(cè)重說明事實(shí)。 he was writing all night last night. (生動(dòng)的描寫,他一直寫……)he wrote something last night. (說明他寫了……的事實(shí))注:下列幾類動(dòng)詞通常不用于進(jìn)行時(shí)。 ① 表示狀態(tài)的動(dòng)詞be; ② 感官動(dòng)詞:feel,hear,look,smell,taste等; ③ 表示思維或心理狀態(tài)的動(dòng)詞:believe, forget,consider(認(rèn)為),know,remember,hope,wish,want 等; ④ 表示所屬關(guān)系的動(dòng)詞: belong,have,own,hold(容納)等。 本單元鞏固練習(xí):